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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 800 Pm Pst Thu Dec 7 2023
.small craft advisory in effect through Friday morning...
Tonight..N winds 15 to 25 knots with gusts up to 25 knots. Wind waves 4 to 5 ft. W swell 9 to 11 ft at 14 seconds. A slight chance of rain this evening.
Fri..NW winds 10 to 20 knots with gusts up to 25 knots. Wind waves 4 to 5 ft. W swell 8 to 10 ft at 13 seconds.
Fri night..N winds 15 to 20 knots. Wind waves 3 to 4 ft. W swell 6 to 8 ft at 12 seconds.
Sat..NE winds 5 to 10 knots. Wind waves 2 to 3 ft. NW swell 5 to 7 ft at 12 seconds.
Sat night..N winds 5 to 10 knots. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 16 seconds.
Sun..N winds 5 to 10 knots. Wind waves 3 to 4 ft. W swell 5 to 7 ft at 14 seconds.
Sun night..NW winds 5 to 10 knots. Wind waves 4 to 5 ft. W swell 5 to 7 ft at 12 seconds.
Mon..NW winds 10 to 15 knots. Wind waves 4 to 5 ft. W swell 3 to 5 ft.
Tue..N winds 5 to 10 knots. Wind waves 2 to 3 ft. W swell 3 to 5 ft.

PZZ500 800 Pm Pst Thu Dec 7 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
a cold front over the north central coast will continue to move southeastward tonight. Elevated seas between 12 and 15 feet will persist through late week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small crafts.

FXUS66 KEKA 072243 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 243 PM PST Thu Dec 7 2023

SYNOPSIS
Showers with small hail will diminish tonight and then a cold airmass will promote frost and freezing temperatures tonight and Friday night. Otherwise building high pressure will bring dry weather conditions before the next chance for rain on Sunday.

DISCUSSION
Showers will diminish through the remainder of the day as the storm system shifts to the southeast. Any lingering showers through tonight will be capable of producing small hail along the Humboldt and Del Norte county coastlines but the overall trend is for decreasing activity tonight. The colder airmass will help drop temperatures along the coast into the upper 30s and 40s while inland temperatures will dive into the upper 20s and 30s for tonight. Friday night will also have frost and freezing temperatures but a degree or two colder than tonight. Building high pressure will otherwise promote dry weather conditions through Saturday. Then next opportunity for precipitation will be on Sunday as shortwave trough slides overtop the ridge. Right now, this is looking like a low impact event with the best chances for precipitation focused across Del Norte and northern Humboldt counties. Storm total rainfall looks to be under 0.50 inches. With Trinity, Mendocino, and Lake counties potentially observing nothing. Additionally, this is a much warmer airmass with day time temperatures near normal and snow levels above 5000 feet. Early next week is looking dry and potentially warmer than normal as the exiting shortwave and high pressure generate an offshore flow pattern which tends to help to increase coastal temperatures.
Looking at the tail end of the forecast period, and beyond, long range models are beginning to highlight the next chance for rain late next week but there remains a lot of uncertainty this far in advance. KMZ

AVIATION
An early morning frontal passage moved across...and significantly impacted North Coast airports. Weather activity was preceded and accompanied by: showers, some strong with small hail, and isolated thunderstorms, gusty winds, low Cigs (mainly MVFR) and low Vis (occasionally IFR). Hampering conditions at the air terminals should diminish as instability wanes, however enough energy will remain present to at least keep -SHRA/VCSH with isolated small hail through tonight. Impactful minimum conditions occurred at UKI again this morning; Showers continued into afternoon with Cig/Vis frequently MVFR occasionally IFR. /TA

MARINE
Moderately gusty conditions are still being registered by buoy data as scattered post frontal showers wind down this afternoon and evening. Elevated wave heights and NW winds will continue to steadily decrease overnight into Friday along with a diminishing northwesterly swell. A surge of increasing winds will develop Friday afternoon and evening, mainly in the southern waters south of Cape Mendocino, with the sea state continuing to trend down below 10 ft. Winds are expected to shift to a southerly direction and increase ahead of an incoming frontal system late this weekend. Another westerly mid-period swell will fill in Sunday alongside this system.

EKA WATCHES/WARNINGS/ADVISORIES
CA...
Winter Weather Advisory until 4 PM PST this afternoon for CAZ107.

NORTHWEST CALIFORNIA COASTAL WATERS...
Small Craft Advisory until 10 AM PST Friday for PZZ450-455- 470-475.

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Arena Cove
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Thu -- 01:52 AM PST     Moonrise
Thu -- 06:49 AM PST     5.50 feet High Tide
Thu -- 07:19 AM PST     Sunrise
Thu -- 01:38 PM PST     1.68 feet Low Tide
Thu -- 01:47 PM PST     Moonset
Thu -- 04:52 PM PST     Sunset
Thu -- 07:22 PM PST     3.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Arena Cove, California, Tide feet

Point Arena
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Thu -- 01:24 AM PST     0.00 knots Slack
Thu -- 01:52 AM PST     Moonrise
Thu -- 04:27 AM PST     0.77 knots Max Flood
Thu -- 07:20 AM PST     Sunrise
Thu -- 07:32 AM PST     -0.00 knots Slack
Thu -- 10:25 AM PST     -0.92 knots Max Ebb
Thu -- 01:47 PM PST     Moonset
Thu -- 02:28 PM PST     0.00 knots Slack
Thu -- 04:52 PM PST     Sunset
Thu -- 05:15 PM PST     0.65 knots Max Flood
Thu -- 08:09 PM PST     -0.00 knots Slack
Thu -- 10:36 PM PST     -0.67 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Point Arena, California Current, knots

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